Posner Brian S: insider buys
Every open-market stock purchase reported by Posner Brian S to the SEC on Form 4.
Total bought$314.84K
Purchases8
Companies1
Last purchase filedOct 6, 2026
Return on these buys-1.9%
Posner Brian S has made 8 open-market purchases worth $314.84K in 1 company since Mar 10, 2026, according to SEC Form 4 filings. The most recent was filed on Oct 6, 2026: 2,500 shares of DYN at $16.00 (Director), worth $40K. The largest was $45.18K of DYN on Mar 6, 2026. Taken together, these purchases are down 2% at the latest closing prices (split-adjusted, weighted by amount).
Companies Posner Brian S bought
| Ticker | Company | Role | Buys | Total | Since buy | Last filed |
|---|---|---|---|---|---|---|
| DYN | Dyne Therapeutics, Inc. | Director | 8 | $314.84K | -1.9% | Oct 6 |
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| Filed | Stock | Insider | Value | Shares | Price | Since buy | Stake | Trade | |
|---|---|---|---|---|---|---|---|---|---|
| Oct 6 | DYNDyne Therapeutics, Inc. | Posner Brian SDirector | $40K | 2,500 | $16.00 | +4.3% | +10% | Oct 2 | SEC |
| Jun 9 | DYNDyne Therapeutics, Inc. | Posner Brian SDirector | $33.88K | 2,000 | $16.94 | -1.5% | +9% | Jun 8 | SEC |
| Jun 5 | DYNDyne Therapeutics, Inc. | Posner Brian SDirector | $43.70K | 2,500 | $17.48 | -4.5% | +12% | Jun 3 | SEC |
| May 28 | DYNDyne Therapeutics, Inc. | Posner Brian SDirector | $36.42K | 2,000 | $18.21 | -8.3% | +11% | May 26 | SEC |
| May 22 | DYNDyne Therapeutics, Inc. | Posner Brian SDirector | $42.80K | 2,500 | $17.12 | -2.5% | +16% | May 20 | SEC |
| Apr 1 | DYNDyne Therapeutics, Inc. | Posner Brian SDirector | $34.16K | 2,000 | $17.08 | -2.3% | +15% | Mar 30 | SEC |
| Mar 13 | DYNDyne Therapeutics, Inc. | Posner Brian SDirector | $38.70K | 2,000 | $19.35 | -14% | +17% | Mar 11 | SEC |
| Mar 10 | DYNDyne Therapeutics, Inc. | Posner Brian SDirector | $45.18K | 3,000 | $15.06 | +11% | +35% | Mar 6 | SEC |